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' F. LGSEL s'ram POWER PLANT Filed April 21'. 1924 mur EXCHANGE? euamz(TURBINE) liwemzvfl 1 11 'o'Sel/ Patented Oct. 5,

UNITED STATES FRANZ LdSEL, OF BRUNN, CZECHOSLOVAKIA.

STEAM-POWER PLANT.

Application filed April 21, 1924, Serial No. 708.082. and in AustriaApril 14, 1923.

his invention refers to steam power piants and more particularly toplants ineluding engines such as steam turbines and to the utilizationtherein of the energy of steam to as great an extent as possible.

The waste heat of steam power plants more particularly the waste heat ofthe smoke or flue ga es were heretofore utilized in economizers forheating the feed water H) or preheating the combustion air, and the fluegases were also utilized for superheating team. Similarly the heat ofthe exhaust steam of steam engines and steam turbines is utilized eitherfor heating purposes or by collecting it in heat accumulators which thensupply heating water or low pressure steam. The two sources of wasteheat are thus utilized independently of each other in similar ways.

I have found that in many cases it is more advantageous to utilize thewaste heat of the smoke or flue gases for improving the condition ofext: action steam or waste steam in combination with heat accumulators.Accordingly my invention consists in reconditioning the extraction orexhaust steam of steam engines including also steam turbines in asurface heat exchange apparatus heated by waste heat, connecting theheat exchange apparatus with a heat accumulator and in then supplyingthe steam required for furher steam consumption apparatus either fromthe heat exchange apparatus or from th h at accumulator or from both.Preferably the surface heat exchange apparatus is provided with meansfor injecting water and is adapted for additional steam genera tion,

In modern steam turbine plants the extrac' tion or exhaust steam fromthe last or low pressure turbines has a comparatively high pres ure, butis very wet: this steam requires only some heating up for permitting itto be utilized in engines. It has already been proposed to heat up apart of such extraction or exhaust steam and to do so in the usual knownreheater or super-heater of the boiler plant and therefore this heatingup involves a reduction of the normal production of steam in theboilers. According; to my invention, however, the reconditioning of theextraction or exhaust steam is brought about by the waste heat of thesmoke or fuel gases and combining or connecting the heat exchangeapparatus with heat accumulators, with the result that I obtain by myinvention a highly efiicient low pressure steam meeting clearly andeconomically the required conditions and demands and taking care of theirregularities in the con' dition and quantity of the exhaust or extraction steam required.

According to a preferred fo m of the invention, provision is made of asteam power plant including an engine, preferably a turbine. a surfaceheat exchange apparatus heatec by wazte heat, a heat accumulator. pipeline connecting said engine with sai-l heat exchange apparatus to leadexhaust extraction steam from aid engine to said heat exchangeZIPQZU'ZUHU, a means, including a second pipe tine, to lead steam fromsaid her-t exchange app 'atus for further use. a third or branchconnection pivc line leadinu to said heat acwunulutor a fourth pipe lineleading am from said heat accuniu.- iator for further to render saidaccumulator capable of use in series with the third and fourth pipelines and in parallel with the second pipe linea.

The annexed drawin illustrates diagrammatically by way of example anembodiment of my invention.

In the drawing T indicates a steam turbine, iv a surface heat exchangeapparatus heated by S1110l or fine gases, waste gases or the like and Sa heat accuinulator of any known or preferred construction. Prefet ablyan economizer specially provided for this purpose or a part or theeconomizcr system of the boiler plant itself is used an the heatexchange apparatus. The saturated steam coming from any part of thesteam engine plant, which term is to he IlDdQII-tOO i to include alt-ost "in turbine plants. through a pipe D is heated in the heat exchangeapparatus lV by wa te heat and is th *rehv coin \crted into perheatedsteam which eiihiu' flows through the pipe D and a eoutWz-l valve 0directly to consumption appa atus or through a control valve 0 to a heatcumulator S from which it may be supoliel as accumulator steam throughthe pine l). to any apparatus where it may be utilized: Of course theheated up stezim may flow through the elves c and e simuitaneouslv. orsteam taken from the accumulator S through the valves 0 and u may beadded to the steam coming from the heat excl ange apparatus a is acontroliing valve on the turhiac which in some cases for instance incase of back pressure turbines may be dispensed with.

H is a water injection pipe for the heat exchange api iaraius IV, and bis a controlo or tluitting oil device provided in the for instance atemperature controlling "w c The object of the injection of wais tocontrol the condition at which the steam enters the heat exchangeapparatus and if required the condition at which the steam escapes fromsuch apparatus. Under certain conditions the injection of water may alsoresult in generating additional steam.

Oncoi the advantages secured by the in vention is that on the one handin the engine more particularly an extraction or back prc sure turbinethe energy of the extraction, back pressure or exhaust steam may beutilized under more favorable conditions to the lowest possibletemperature and that on the other hand the steam consumption apparatusreceives steam of the condition desired. The latter advantage isobtained almost without any expenses by using the waste heat of theplant for heating the heat exchange apparatus and also connecting samewith a heat accumulator r thermal storage. By this invention theefiiciency of the turbine and of the entire plant is increased and theeconomy of the plant is improved.

lVhat I claim is:

1. In a steam power plant, the combination of an engine, a surface heatexchange apparatus heated by waste heat, a heat accumulator, a pipe lineconnecting said engine with said heat exchange apparatus to lead exhaustor extraction steam from said engine to said heat exchange apparatus,means, including a second pipe line to lead steam from said heatexchange apparatus for further use, a third or branch connection pipeline leading steam from said heat exchange apparatus to said heataccumulator and a fourth pipe line to lead steam from said accumulatorfor further use, to render said accumulator capable of use in serieswith the third and fourth pipe lines and in parallel with the secondpipe line.

2. In a steam power plant, the combination of a turbine, a surface heatexchange apparatus heated by waste heat, means for injecting water intosaid heat exchange apparatus, a heat accumulator, a pipe line to leadsteam from the turbine to the surface heat exchange apparatus, a pipeline to lead steam from said heat exchange apparatus for further use,and a branch connection pipe line leading to said heat accumulator.

3. In a steam power plant, the combination of an en ine, a pipe linethrough which exhaust or extraction steam from said engine passes tosteam consumption apparatus,

a heat acciunulz-itor connected with said pipe line and having an outletthrough which steam may be withdrawn, valve means controlling the flowof the steam to steam consumption apparatus and said heat accumulator, a-d means, located in said pipe line interne nate said engine and the ownncction of said heat accumulator with d pipe line, for reconditioning;the steam fr an the engine as required by the use to be made thereof.

4. In a steam power plant, the combinze tion of an engine, means forrccond'tioning extraction or exhaust steam from said engine andincluding a surface heat exchange up ratus heated by waste heat ain.moans for injecting w te into said extraction or exhaust steam at theentrance of said heat e'-.cl'iange apparatus, a pipe line to lead thereconditioned steam from sa' exchange T l heat apparatus for use insteam consumption paratus, a heat accumulator connected with :Ziltl pipeline at an intermediate point, and means to control the passage of therec ditioned steam to the steam consumption apparatus or to the heataccumulator wiihout interference with the working of the engine.

In a steam power plant, the combination of an engine, a pipe linethrough wnich exhaust or extraction steam from said engine passes tosteam consumption apparatus, a heat accumulator connected with said pipeline, valve means for controlling the flow of the steam to said steamconsumption apparatus and said heat accumulator, and means, located insaid pipe line intern'iediate said engine and the heat accumulatorconnection, for reconditioning the steam both qualitatively andquantitatively in accordance with the flow of steam to said steamconsumption appara us or said heat accumulater.

6. In a steam power plant, the combination of an engine, a pipe linethrough which exhaust or extraction steam from said engine passes tosteam consumption apparatus, a heat accumulator connected with said pipeline, valve means for controlling the flow of the steam to said steamconsumption apparatus and said heat accumulator, and means, located insaid pipe line intermediate saiei engine and the heat accumulatorconnection, for reconditioning th steam both qualitatively andquantitatively in ccordance with the flow of steam to said steamconsumption apparatus or said heat accumulator, and comprising heatexchange apparatus heated by fine gases and water injection means to acton the steam at the entrance of said heat exchange apparatus.

In testimony whereof I affix my signature.

FRANZ LosEL.

